scholarly journals Influence of Solvents on the Oxidation Kinetics of Aldehydic Group Compounds by Diethylammonium Chloro-chromate

2021 ◽  
Vol 37 (6) ◽  
pp. 1329-1335
Author(s):  
Divya Chandora ◽  
Pramila Bishnoi ◽  
Ganpatram, Om Prakash ◽  
Vinita Sharma
Keyword(s):  
Redox Reactions ◽  
Isomeric Form ◽  
Hydride Ion ◽  
Solvent Model ◽  
Diethyl Ammonium ◽  
Reaction Constants ◽  
Kinetics Of ◽  
Aldehydic Group ◽  
Influence Of Solvents ◽  
Acid Dependence

The redox studies of some compounds containing aldehydic functional groups by diethyl ammonium chloro-chromate (DEACC) in dimethyl sulfoxide leading a product forming to acid of correspondimg order. Reactions are found to be in unit order with oxidant while a fractional order (less than unity) was found w.r.t. reductants. The redox reactions are influenced with acid, the acid dependence is governed by this equation: kobs = a + b[H+].. When isomeric form of aldehyde, that is Me-CDO is oxidised with the same oxidant it was observed a considerable K.I.E. (Deuterium effect; kH/kD = 05.69 at 298 K). The reaction of Acetaldehyde was done in various non aqueous medium, soluble or miscible in DMSO. The effect of solvent is studied fitting our data in the solvent model of Taft's and Swain's applied for this purpose.. Rate constants are correlating very well with already reported Taft’s values of *; further the reaction constants are negative in nature. Suitable mechanism involving are proposed with transfer of hydride ion..

The Formation of Cu3Si from Cu/a-Si Multilayers

1997 ◽  
Vol 481 ◽  
Author(s):  
R. R. Chromik ◽  
W. K. Neils ◽  
E. J. Cotts
Keyword(s):  
Diffusion Couples ◽  
X Ray Diffraction ◽  
Limited Growth ◽  
Scanning Calorimetry ◽  
Individual Layer ◽  
Diffusion Limited ◽  
Reaction Constant ◽  
Multilayered Composites ◽  
Reaction Constants ◽  
Kinetics Of

ABSTRACTThe kinetics of the formation of Cu3Si in Cu/a-Si diffusion couples have been investigated by means of differential scanning calorimetry and x-ray diffraction. Multilayered composites of average stoichiometry Cu3Si were prepared by sputter deposition with individual layer thicknesses varying in different samples between 2 and 100 nm. We observed diffusion limited growth of Cu3 Si upon annealing these diffusion couples below 500 K. Reaction constants were measured for a temperature range of 455 to 495 K for thicknesses of growing Cu3Si between 2.6 and 80 nm. The temperature dependence of the reaction constant, k2, was characterized as k2 = k0 exp(− Ea/kbT) with activation energy, Ea = 1.0 eV/atom and pre-factor, k0 = 1.9×10−3 cm2/s.

Kinetics of inorganic redox reactions in seawater

1986 ◽  
Vol 19 (2) ◽  
pp. 121-137 ◽  
Author(s):  
Zhang Jia-Zhong ◽  
Michael Whitfield
Keyword(s):  
Redox Reactions ◽  
Kinetics Of

Enhanced kinetics of polysulfide redox reactions on Mo2C/CNT in lithium–sulfur batteries

2018 ◽  
Vol 29 (29) ◽  
pp. 295401 ◽  
Author(s):  
Rameez Razaq ◽  
Dan Sun ◽  
Ying Xin ◽  
Qian Li ◽  
Taizhong Huang ◽  
...  
Keyword(s):  
Redox Reactions ◽  
Lithium Sulfur Batteries ◽  
Kinetics Of ◽  
Lithium Sulfur

The effect of viscosity on the kinetics of redox reactions in highly viscous silicate liquids

2012 ◽  
Vol 136 (22) ◽  
pp. 224502 ◽  
Author(s):  
Ladislav Kido ◽  
Matthias Müller ◽  
Christian Rüssel
Keyword(s):  
Redox Reactions ◽  
Silicate Liquids ◽  
Kinetics Of ◽  
Kinetics Of Redox Reactions

The kinetics and the mechanism of oxidative decarboxylation of benzilic acid by acidic permanganate (stopped-flow technique) — An autocatalytic study

2004 ◽  
Vol 82 (9) ◽  
pp. 1372-1380 ◽  
Author(s):  
Sairabanu A Farokhi ◽  
Sharanappa T Nandibewoor
Keyword(s):  
Activation Parameters ◽  
Oxidative Decarboxylation ◽  
Two Stage ◽  
First Order ◽  
First Order Kinetics ◽  
Stage Process ◽  
Benzilic Acid ◽  
Reaction Constants ◽  
Kinetics Of ◽  
Good Agreement

The kinetics of the oxidation of benzilic acid by potassium permanganate in an acidic medium were studied spectrophotometrically. The reaction followed a two-stage process, wherein both stages of the reaction followed first-order kinetics with respect to permanganate ion and benzilic acid. The rate of the reaction increased with an increase in acid concentration. Autocatalysis was observed by one of the products, i.e., manganese(II). A composite mechanism involving autocatalysis has been proposed. The activation parameters of the reaction were calculated and discussed and the reaction constants involved in the mechanisms were calculated. There is a good agreement between the observed and calculated rate constants under different experimental conditions.Key words: oxidation, autocatalysis, benzilic acid, two-stage kinetics.

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